Hamburg 2009 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 15: Poster I

A 15.37: Poster

Dienstag, 3. März 2009, 16:30–19:00, VMP 9 Poster

EIT and cooling by EIT in an optical dipole trap — •Andreas Ahlrichs, Carl Basler, Christoph Käfer, Maryam Roghani, and Hanspeter Helm — Physikalisches Institut, Albert-Ludwigs-Universität Freiburg

We attempt an experiment in which Rb-atoms which are pre-cooled in a UHV MOT and then transferred into a CO₂ -laser trap are cooled further by electro-magnetically-induced transparency. The scheme is that predicted to work in a recent publication (MR and HH PRA 77 043418 (2008)) even under conditions far from the Lamb-Dicke limit. In this presentation we discuss the limitations which should appear in EIT-cooling of neutral atoms and the rather stringent experimental conditions required to be met for successful implementation of the scheme. The storage time of 1 minute which we achieved in our single beam CO₂ -laser trap appear well sufficient to cool over the required millisecond time period. We hope to also present first experimental results on this topic.

Research supported by DFG HE2525/7-1